Pressure Sealing and Continuous Flow: Pressure sealing and continuous flow sealing refers to using pressure to seal the original pipeline, and then installing and replacing pipeline fittings through bypass pipelines under the condition of continuous flow. The process of this technology is: welding four-way fittings at the connection points requiring pipeline sealing; making holes in the pipeline using a boring machine; connecting sealers and other sealing devices to the pipeline and performing the sealing operation; connecting the bypass pipeline with the original pipeline; unsealing the pipeline and backfilling pipe blocks after connection; implementing anticorrosive treatment on the four-way fittings and using double-sealing and flow diversion to temporarily reroute the operating medium through the bypass pipeline. After replacing the severely corroded original pipeline with a new anticorrosive pipeline, the operating medium is then rerouted to the new pipeline. Through continuous flow pressure sealing technology, the entire construction process can be carried out under the conditions of continuous flow and pipeline operation.

The continuous flow pressure-sealing technology for pipelines not only enables the relocation, replacement, installation, and even the addition of branch pipelines under conditions where the pipeline medium is continuously transported, but also facilitates safe and rapid emergency repairs in the event of a pipeline leak, ensuring timely resumption of normal pipeline operations. This technology features no temperature drop, no pressure reduction, and no production downtime, ensuring the smooth operation of process industrial transportation. Therefore, it offers high overall benefits and practical value. While the construction process of this continuous flow pressure-sealing technology can be complex for longer pipelines, with a reasonable plan, strict adherence to procedures, and stringent control, it can safely and efficiently meet the requirements and standards for pipeline modification timeliness and cost-effectiveness, while also significantly mitigating risks.